Do you like talking with your friends on the telephone or mobile phone— . I enjoy chatting online.

So _____ that modern industry cannot develop without it.

I have bought some books recently, but ________ interests my father.

Who are playing football in the gym now________ the students from No. 1 Middle School.

The old lady’s hand shook frequently.She explained to her doctor ______ this shaking had begun half a year before, and, ______ only because of this, she had been forced to give up her job.